Pump



`May 23, 1933. R N vlcKvERs 1,911,170

' PUMP Filed April 21, 1952 A f5 24 5mm;

'Patented May 23, 1933' UNITED STATES PATENT OFFICE IRICI-IIIAIRJI) N.VICKERS, vOIF SMACKOVER, ARKANSAS PUMP Application filed April 21,

This invention relatesto deep well pumps and has for its object theprovision of means whereby an accumulation of pressure around theplunger may be avoided so that the re- 5 sistance to the downward strokeof the plunger, which has been heretofore encountered, will be overcome.The invention is illustrated in the accompanying drawing and will behereinafter irst fully described and ,lo then more particularly definedin the appended claims.-

In the drawmg, Figure l 1s a vertical section through a deep Well pumphaving th'e tube and a ball valve 4 being located freely within thecage. To the upper end of the tubular body 1 is secured a sleeve 5 andin the upper end of this sleeve is threaded a couplingbody 6. The body 6is provided o with' reduced extensions or necks 7 and 8 at its lower andupper ends, respectively, and both said necks or extensions areinternally threaded, as shown. A valve chamber 9 is formed in the lowerend of the coupling body Gand a free ball valve 1() is disposed in saidchamber, a seat 11 being held to the lower is threadedrinto the lowerend of the' neck 7 as clearly shown. Annular shoulders 13 and 14 areformed by the ends of the body 6 around the respective necks 7 and 8 anda passage 15 is formed through the body to lead from the lower shoulder13 to the bore of the upper neck 8 while a similar passage 16 leads fromthe valve chamber 9 to thev upper shoulder 14 at the outer side of saidneck 8. A section 17 of the outer casing 1s threaded onto the upper endof the-,coupling body 6 and it will be seen at once that an annularspace is provided between the neck 8 1932. Serial No. 606,705.

and said section 17 corresponding to the annular space between the neck7 and the sleeve 5. Threaded into the neck 8 is the lower end of acylinder or standing tube 18 the upper end of which is open, and fittedclosel but slidably in the cylinder or standing tu e 18 1s a plunger 19,as shown. The upper end of the plunger is threaded into a head 20 on theupper end of which is formed a sub 21 to be attached to the sucker rodor other pumping element. The lower end of the head 20 is externallythreaded, as clearly shown, and an outer sheath or working sleeve 22y isengaged at its upper end with the externally threaded extremity of thehead and depends from the head to fit closely but slidably around thecylinder or standing tube 18. It will now be understood that, assumingthe plunger to make an up stroke, liquid will be drawn past the lowervalve 4 into the interior of the sleeve 5 and will thence flow throughthe passage l5 into the lower end of the .cylinder or standing tube 18.On the ensuing downV stroke of the plunger, the liquid wifill be vforcedback through the passage 15 but the valve 4 will be seated and thepressure upon the liquid will thereupon cause it to unseat the valve 10and flow upwardly past the same through the passage'l into the interiorof the casing section 17 whence it will rise to the surface.`

It will be noted that an annular chamber 23 is formed between the sheath22 and the plunger and above the upper end of the standing tube orcylinder 18, which chamber will vary in its cubic content as the plungerend of the body by an annular vplug 12 whlch and the sheath recip-rocatevertically. It has been found that some liquid will find its way intothis annular chamber and will resist the downward movement ofthe plungerso that the plunger cannot make a full stroke and the operation of thepump becomes difficult. It is a particular object of the presentinvention to relieve this back pressure and, to such end, radial ports24 are formed through the upper portion of the plunger to communicatewith the annularv chamber 23 at their outer ends and at their inner endscommunicate with an axial bore or chamber 25 formed in the plunger andextending through the upper extremity of the same. A valve chamber 26 isformed in the lower portion of the head 2O and a ball valve 27 is placedin said chamber to rest upon a valve seat 28 which is held upon the endof the plunger by an internal annular shoulder of the head, as clearlyshown in Fig. 2. Radial ports 29 lead from the upper end of the valvechamber 26 through the head so as to communicate with the interior ofthe pump casing, as shown, so that any water or other liquid which mayfind its way into the valve chamber 26 will escape into the outer casingand will rise to the surface with the main body of the liquid beingforced up vby the pump. On the down stroke of the plunger, the lower endof the head will impinge upon the liquid which may haveaccumulated inthe chamber 23 and will tend to compress it so that it will be forcedinwardly through the ports 24 to the chamber 25 and thence rise past thevalve 27. Said valve will obviously prevent back flow of the liquid butwill permit its escape through the ports 29 which Willoccur as theliquid accumulates in the valve chamber 26.

From the foregoing description, taken in connection with theaccompanying drawing,

it will be seen that I have provided an eX- ceedingly simple means forrelieving the back pressure upon the plunger due to the accumulation ofliquid around the upper portion of the same. The cost of adding thisstructure to pumps now in existence of the type illustrated ispractically nil and the eiiciency of the pump is very greatly increased.

Having thusdescribed the invention, I claim 1. A pump comprising astanding tube, a solid plunger Working snugly in vsaid tube, a headlconnected to the upper end of the plunger and provided with a chamber,a sheath carried by the head and depending therefrom and telescoping thestanding tube, the plunger being provided with a central longitudinalbore opening directly into the chamber of the head and having passagesleading from the space between the plunger and the sheath ,through theupper extremity ofthe bore, said chamber being in communication withsaid passages and having ports leading outwardly therefrom throughtheside of the head, and a valve disposed within the chamber at theupper end of the longitudinal bore for controlling the passage of`,iluid through said bore into the chamber.

2. A pump comprising a standing tube, a solid plunger working snugly insaid tube and having its upper end provided with a central longitudinalbore opening through the top thereof, a head connected with the upperend of the plunger and provided with a longitudinal chamber of greatercross sectional diameter than the bore and communieating therewith, asheath depending from the head and telescoping the standing tube,

there being unobstructedlateral intake passages leading from the spacebetween the plunger and sheath into the lower end of said bore andunobstructed lateral escape ports formed in the head and communicatingwith the upper portion of the interior of the chamber, and a singlevalve disposed within said chamber at the upper end of the longitudinalbore and beneath the lateral escape ports for controlling the passage ofliquid through said bore into the chamber.

3. A pump comprising a standing tube, a solid plunger working snugly insaid tube, a head connected to the plunger and provided with a chamber,the upper end of which is closed, a sheath depending from the head andbearing against and tclescoping the standing tube, the upper portion ofthe plunger being provided with a centrally disposed longitudinal boreopening directly into the chamber of the head and having unobstructedradial intake passages leading from the space between the plunger andsheath into said bore, a valve seat disposed-at the upperl end of thebore, there being radial escape ports leading outwardly from thechalnber above the valve seat and discharging at the outer surface ofthe head, and a single valve engaging said valve seat for controllingthe passage of liquid through the bore into the chamber.

4. A pump comprising a standing tube, a solid plunger working snugly insaid tube and having its upper portion recessed to form a longitudinalbore extending for a portion of the length of the plunger and openingthrough the top thereof, a head connected with the upper end of theplunger and provided with a chamber the upper end of which is closed, asheath depending from and telescoping the standing tube, said plungerbeing provided with radial intake passages leadinO from the spacebetween the plunger and` sheath into the bore near the lower endthereof, there being radial escape ports formed in the head and leadingoutwardly from the chamber near the closed end thereof, and a valve atthe upper'end of the bore and spaced from the escape ports forcontrolling the passage of fluid through said bore into the chamber.

In testimony whereof I alix my signature.

RICHARD N. vIcKERs. FL. SJ

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